Acoustic sensor device with noise suppression

Details Acoustic sensor device with noise suppression Acoustic sensor device with noise suppression

1990-06-29

1991-08-13

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

367901, 367 1, G01S 380

Patent

active

050401564

ABSTRACT:
Acoustic sensor device with noise suppression, in particular for sensors arranged on a noise-generating aggregate, using a double sensor (M1, M2) located between a noise source (S) and an object emitting the sound to be picked up, one of the sensors (M1) being directed towards the noise source (S) and supplying to a control circuit (R) a noise signal which controls an anti-noise source (A) in such a way that it generates an anti-phase sound p.sub.A for compensating the noise p.sub.S, the other sensor (M2) being directed toward the object to be measured and supplying a measuring signal in which the noise fraction is highly weakened and the useful sound fraction is barely weakened, so that the acquisition range of the sensor (M2) is extended as a result of this reduction of sound fractions as a function of the direction of arrival.

REFERENCES:
patent: 2043416 (1936-06-01), Lueg
patent: 4473906 (1984-09-01), Warnaka et al.
patent: 4805733 (1989-02-01), Kato et al.

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